mongodb 3.4 学习 (一) 安装
#4. transparent_hugepage机制，在内核中禁用 ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.** We suggest setting it to 'never'
** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.
** We suggest setting it to 'never'
cat > /lib/systemd/system/disable_transparent_hugepage.service << EOF
Description="Disable Transparent Hugepage before MongoDB boots"
Before=mongodb.service
Type=oneshot
ExecStart=/bin/bash -c 'echo never > /sys/kernel/mm/transparent_hugepage/enabled'
ExecStart=/bin/bash -c 'echo never > /sys/kernel/mm/transparent_hugepage/defrag'
RequiredBy=mongod.service
EOF
systemctl enable disable_transparent_hugepage && systemctl start disable_transparent_hugepage
systemctl restart mongod
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